.content-tool {
    position: relative;
    min-width: 200px;
    height: calc(100vh - 70px);
    padding: 20px;
    resize:horizontal;
    overflow: hidden;
    // border-left: 1px solid #b6b6b6;
    flex-grow: 2;
    box-sizing: border-box;

    &::before {
        content: '';
        position: absolute;
        left: 0;
        top: 0;
        width: 1px;
        height: calc(100vh - 70px);
        background-color: #b6b6b6;
        cursor: w-resize;
    }
}